WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 4,2007, Pages 572-578,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 4,2007, Pages 497-502,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 4,2007, Pages 493-496,
WORLD JOURNAL OF GASTROENTEROLOGY, Volume 13, Issue 4,2007, Pages 585-587,